Device for securing flexible pipes



Sept. 3, 1929. K. TUTE 1,726,871

- DEVICE FOR SECURING FLEXIBLE PIPES 4 Filed Feb. 29, 1928 Inn /1201': Mw

Patented Sept. 3, 1929.

UNITED STATES tuaaa PATENT OFFICE.

KARL TUTE, OF BERLIN-SCHONEBERG, GERMANY.

DEVICE FOR SECURING FLEXIBLE PIPES.

Application filed February 29, 1928, Serial No. 258,019, and in GermanyJuly 12, 1927.

My invention relates to a device for securing flexible pipes, forinstance, rubber tubes,

on metal pipes by means of a flexible band surrounding the pipe to whichtension is imparted for exerting radial pressure on the flexible pipe soas to hold it in position on the metal pipe. It is an object of myinvention to improve a device of this kind with a view to simplificationand to this end I so design it that the means for exerting tension onthe band also serves as locking means for preventing the band frombecoming loose.

In devices of this kind as heretofore designed one end of the band issecured to the body of the device, the other end to a part by whichtension can be exerted on the band, and separate means such as toggle orother levers, pawls, ratchet wheels, screws, etc., are provided forlocking such tension-exerting part. Such separate locking means involvecomplication and expense, they require a certain skill on the part ofthe operator, and are still not reliable as they are readily renderedinactive by careless handling or by vibration.

As compared with a device of the old type, the new device according tothis invention is very cheap and simple and readily manipulated asseparate locking means are dispensed with altogether. Notwithstandingthis, it is extremely reliable.

It comprises a bracket to which one end of the band is secured, a rotarypin in the bracket and a bar on the bracket about one edge of which theband is stretched by rotating the 1n. p In the drawing afiixed to thisspecification and forming part thereof, a device embodying my inventionis illustrated diagrammatically by way of example.

In the drawing Fig. 1 is a sectional elevation of the device on the lineAB in Fig. 2,

Fig. 2 is an elevation,

Fig. 3 is a planview and Fig.4 shows the device in position on a rubbertube, drawn to a .smaller scale.

Referring to the drawing, the device comprises a U-shaped bracket a withan upwardly projecting lug a, a at either end, and two bars I), c withwhich the bracket is placed on a flexible tube (Z, Fig. 4;, on a pipe 9.The seat of the bracket amay be straight but is preferably curved asshown in Fig. 1 so as to fit the tube (Z more closely.

e is a pin which is carried to rotate in the lugs a, a of the bracket aand is slotted be tween the lugs for the reception of: the free end ofthe band f which serves for securing the rubber tube d, one end of thepin being provided with a head projecting from the lug a and the otherhaving an eye for the insertion of a lever or other tool. Preferably,the pin is'bent from steel of semi-circular seetion in the manner of asplit ring.

The diameter of the pin 6 and the clearance between the bars 6, 0, or,rather, the edge of that bar about which the band is taken to the pin 6,are correlated so that the reach of the hand between the edge of the barabout which the band is stretched, in the present instance the bar I),is substantially vertically below the corresponding side of the pin 6.It makes no difference which of the bars I), 0 the end of the band ,7 isattached to, and if, as shown in Fig. 4, the band is attached to the bar0 and stretched about the edge of the bar 6, the bar 0 might be madewider so that its edge is not vertically, or substantially so, below theside of the pin e. In other words, it is only important that one of theedges of a bar should be in the defined relation to the correspondingside of the pin 6.

When the band f has been attached to the bar 0, it is taken about therubber tube d in a single layer or in any number of layers, and its freeend is stretched about the inner edge of the other bar I), and placedinto the slot of the pin e. By rotating the pin 6, the band 7 is firmlystretched about the rubber tube (1, and at the same time is held on theperimeter of the pin 6 under considerable pressure. Slipping of the bandis prevented by the sharp kink at the point where it is inserted in theslot of the pin 6. Upon further rotation of the pin 6 the band isstretched more tightly, causing the bar 0 to hug tightly the tube d, andreducing the distance of the pin 6 from the tube by compressing thematerial of the tube. This, in turn, causes the bar I) to exert an everincreasing reaction on the band f which under the action of thesubstantially vertical pull between the side of the pin and the edge ofthe bar is sharply bent at an angle which is only slightly larger than90 degs. As the band is sharply bent about the edge of the bar I; andabout the pin 6 where it enters its slot, and as pressure is exerted onthe band at the bar I) and it exerts strong frictional reaction on theperimeter of the pin, it is held taut with great reliability so thatshocks exerted on the bracket a or frequent vibration cannot shake loosethe device. If

under any influence, the pin 6 is accidentally rotated in oppositedirection to that in which it exerts a pull on the band, the sharp bendat the inner edge of the bar 6 will not yield, on the contrary, the bandWill become buckled above the bar Z) so that the angle at this pointwill become more acute.

I Wish it to be understood that I do not desire to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art.

I claim v 1. A device for securing flexible pipes comprising a bracket,apin in said bracket, a bar 7 in said bracket, and a band adapted to beplaced about said flexible pipe, attached to said bracket at one end andto said pin at the other, and to be stretched about the edge of saidbar, the edge of said bar about which the band is stretched, and theadjacent side of said pin being arranged substantially vertically aboveeach other.

2. A. device for securing flexible pipes comprising a bracket, a pin insaid bracket, a pair of bars in said bracket, the edge of one of saidbars being substantially vertically below the corresponding side of saidpin, and a band attached to one of said bars at one end and to said pinat the other and stretched about the edge of that bar Which is in thesaid vertical position With respect to the side of said pin.

In testimony whereof I aflix my signature.

KARL TUTE.

